Baling press



Nov. 7, 1933. D. 1.. SUMMEY BALING PRESS Filed Dec. 4, 1929' 6Sheets-Sheet l Envemtoz Nov. 7, 1933. D. L. SUMMEY 1,934,386

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AOa/v-(AL an M, MIAMI? 7" WW Patented Nov. V 11933 patina ritass DavidL. Snmmey, Waterbury, Conn; Elie Colonial Trust Company and. Richard F.Weeks Summcy executors of said David L.- Sumrney, deceased ApplicationDecember i, 1929. Serial No; dillA iS 3 Claims. (El. W -4:2,

ATEWT This invention relates to presses and to con- Fig. 5 is a left endelevation similar to the lowtrolling means for presses having amultiplicity er portion of Fig. l but showing certain parts of relatedpower actuated elements and more omitted from Fig. at; particularly tocontrolling means for presses of Fig. 6 is a plan view looking upwardtoward T the type generally referred to as baling presses. the bottom ofFig. 4; 55

A preferred embodiment of the invention has been Fig. '7 is an enlargedplan view or" the press box selected for purposes of illustration andwill be and adjacent related parts; described herein without mention ofother cm" Fig. 8 is an enlarged side elevation of the press bodiments oradaptations of the invention, which box;

It; will nevertheless be apparent to those skilled in Fig. 9 is avertical section taken on the line the art to which this inventionrelates. 9-9 of Figs. 7 and 8;

The invention has been developed in connection Fig. 10 is a sectiontaken on the line lll-l0 with presses of heavy construction such as areof Fig. l; employed for baling sheet metal trimmings, Fig. 11 is a sideelevation of a pressure limiting 1-3 tangled or rejected metal wire orrods and the device; like and has been embodied in a specific type ofFig. 12 is a front elevation of the same; and 7 press in which thematerial placed within the Fig. 13 is a schematic representation ofparts press box is compressed first against a fixed side together with awiring diagram for the same. thereof by one ram, and subsequentlyfurther Two presses are shown in Fig. l but the folii) compressedagainst a removable side by a second lowing description will be limitedto one press "0 ram acting at an angle to and preferably across sincethe other corresponds in all respects to the the face of the first ramafter the latter has been one described. Referring now to the drawings,brought to the end of its stroke. Therefore the particularly Fig. 2, itwill be observed that the invention will be described particularly withrefapparatus comprises a box providing a hal- 53 erence to such aconstruction, it being understood, ing chamber, a movable cover 21therefor, a hor- 7 however, that the invention may be employed izontalram 22, and a vertical ram 23. with presses of widely differentconstructions or The horizontal ram 22 is provided with a stem havingentirely different application. 26 connected by a flange 27 orequivalent struc- The principal object of this invention is to ture to across head 28 slidable on tie rods 29.

11a provide controlling means for a baling press which The tie rods 29are rigidly connected at one end so will render the press largelyautomatic in its to the press box 20 and at the other end to a operationso that an unskilled laborer employed to cylinder block 30 within whicha piston 31 for feed the material to be baled will be enabled to the ram22 operates under fluid pressure. The operate the press, therebydispensing with the stem 32 of the piston 31 may be provided with 3.,services of one or more additional skilled operaa iiange 33 to connectit with the cross head 28. S5 tors who would otherwise be required.Likewise the vertical ram 23 is provided with a Other objects of theinvention and certain feastem 36 connected by a flange 37 to a crosshead tures of novelty will be apparent from the fol 38 slidable on tierods 39. The tie rods 39 are lowing description of one specificembodiment of rigidly connected at one end to the press box 20 n theinvention when considered in conjunction and at the other end to acylinder block 40 withwith the accompanying drawings in which: in whicha piston ll (Fig. 13) for the ram 23 op- Fig. l is a plan view of aninstallation consistcrates under fluid pressure. The stem l2 of the ingof a pair of similar associated presses, the piston 41 may be providedwith a flange 4-3 to concylinder for the cover operating piston beingnect it with the cross head 38.

omitted; The press box 20 and the cylinder block 30 for Fig. 2 is a sideelevation of one of the presses; the horizontal ram are mounted onhorizontal Fig. 3 is an elevation looking at the right upper I-beams 50supported by vertical I-beams or colend of Fig. 2; umns 51. The cylinderblock 40 for the vertical Fig. l is a left end elevation with portionsbrokram is supported principally by the tie rods 39 5 en away; but maybe kept in position by being secured to the columns 51 if desired. Thepress is thus seen to be L-shaped in its general configuration.Preferably the vertical ram with its cylinder and related parts,constituting one side of the L is extended below the level of the floor52 but may be arranged otherwise if desired.

The pistons 31 and 41 for the rams are actuated on their compressingstrokes by hydraulic pressure which may be applied to move the pistonsforward at will or in a determined order.

That is, the pistons are moved forward by what will hereinafter beconsidered variable or controllable hydraulic pressure. The pistons withtheir connected rams are returned by what will be hereinafter consideredconstant hydraulic pressure; that is, pressure of fluid taken directlyfrom the mains and not subject to valve control. Constant returnpressure, however, is applied to pistons having smaller area than thepistons employed for compressing and although there will be a constanttendency to withdraw the rams, this tendency will be overcome by thesuperior force produced by variable pressure acting upon the largerpistons.

In the specific embodiment shown the pullback pistons for the horizontalram operate within cylinders 55 and are provided with piston rods 56passing out of the rear ends of the cylinders 55. At their outer endsthe piston rods 56 carry yokes 57. Connecting rods 58 passing above andbelow the cylinder 55 serve to attach the yokes 57 to the cross head 28connected to the ram 22 and the large piston 31 for actuating the same.

The pull-back pistons for the vertical ram and its piston operate withincylinders 60 and are provided with piston rods 61 connected at theirouter ends to yokes 62, which yokes are, in turn, connected with thecross head 38 by connecting rods 63 passing along the sides of thecylinders 60.

The cover 21 for the press box 20 is provided with an upstanding lug 65for connecting the cover with a piston rod 66 operated by a pistonmoving under fluid pressure within a cylinder 67. Since the powerrequired to move the cover 21 is not as great as that required for therams it will be convenient to move the cover by pneumatic pressurerather than by hydraulic pressure. Intake pipes 75, 76 are provided atthe ends of the cylinder 67 for the admission and exhaust of air underpressure to the cylinder at either side of the piston. The air at bothends will be under variable or controllable pressure whereby the covermay be moved forcibly and quickly in either forward or rearwarddirection as desired.

The cylinders 55 for the horizontal pull-back pistons and the cylinders67 for the cover operating piston may be formed integral with or berigidly attached to the cylinder block 30 and likewise the cylinders 60for the vertical pull-back pistons may either be formed integral with orrigidly attached to the cylinder block 40.

This invention includes means for controlling the movement of thevarious elements automatically through a given cycle by a precedingmovement of another element and means for interrupting the cycle andallowing the elements to return to their normal positions or to beoperated individually by manual controls. While the automatic controlmeans may vary, in the preferred arrangement it will includeelectrically operated elements and pneumatic elements for the variouspower units whether the units are pneumatically operated directly or arehydrau- As shown most clearly in Figs. 1 and 13, a

hand operated momentary make switch S1 and a momentary break switch S3are mounted adjacent the press box 20 within convenient reach of theoperator. Normally all the operator is required to do when the box hasbeen filled with material is to press the button of switch S1 and thiscauses all the elements of the press to move through the proper cycle tocompress the material into a bale and elevate the bale above the sidesof the box where it may conveniently be removed by the operator, andthereafter to return to their original positions. Switch S3 is foremergency use only. By pressing upon the button of this switch at anytime during the compression cycle, the cycle will be broken and theparts will return to their original positions without proceeding throughtheir normal movements. 7

Referring to Fig. 7, the. cover 21 or some part movable therewith isprovided with a member 44 for closing a switch S7 shortly after thecover starts forward and holding it closed until the cover is withdrawn.The switch S7 is in circuit with other devices so arranged that the twinpress of the pair shown in Fig. 1 cannot be operated while the other isusing fluid from the mains. By this arrangement smaller pumps, mains,etc., may be employed than if both presses should be operatedsimultaneously. Closing of switch S7also brings about the forwardmovement of the horizontal ram. The cover or some connected part is alsoprovided with a member 45 for closing a switch S9 and holding it closedwhile the cover is forward. The switch S9 conditions a circuit whichlater causes the cover to be withdrawn upon the completion of certainother movements.

Referring to Fig. 1, the horizontal ram 22 or some part connectedtherewith is provided with a member 46 for closing a switch S11 afterthe ram has approximately completed its forward stroke. The operation ofswitch S11 causes the upward movement of the vertical ram.

Referring to Fig. 5, the vertical ram 23 or some part connectedtherewith is provided with a member 47 for operating a switch S15. Theswitch S15 is normally open but is closed as soon as the vertical ramstarts to move upward. It is in circuit with the coil of a relay tocause the coil to be locked in circuit when once put in until thevertical ram withdraws.

The vertical ram likewise is provided with a member 48 for operating aswitch S17. Switch S17 is normally open but is closed as soon as thevertical ram starts to move upward. It is in circuit with the switch S9and another switch S13 presently to be described.

The vertical ram also is provided with a member 49 for operating aswitch S5. Switch S5 is normally open but is closed when the verticalram reaches the extreme upper end of its stroke when moving to eject thebale from the press box after the cover has been pulled back. Operationof switch S5 is the last step leading to the return of all unreturnedelements to their original positions.

A switch S13 is actuated by a pressure responsive device generallyindicated at 200 whereby the switch is closed when the pressure on thepiston of the vertical ram reaches a predetermined amount. As explainedabove switch S13 is in circuit with switches S17 and S9 and with otherrelated devices for causing the withdrawal of the rams and cover afterthe pressure on nthe bale reaches the desired point, it being noted thatpressure on the vertical ram is relieved slightly before the coverstarts to withdraw to prevent damage to the latter.

The movements of the cover operating piston in cylinder 67 arecontrolled by a magnetically operated valve V8 provided with a coil C8.The supply of pressure fluid to the cylinder 30 for the piston operatingthe horizontal rain 22 is controlled by a magnetically operated valve V6provided with a coil C6. While a single magnetic valve is found tooperate the horizontal ram satisfactorily for all the presentrequirements, separate magnetic valves may, if desired, be employed forthe inlet and outlet pipes respectively, in a manner similar to thatdescribed below for the vertical ram.

The inlet of pressure fluid to the cylinder 40 of the piston foroperating the vertical ram 23 is controlled by a magnetically operatedvalve V4. provided with a coil Cat and the outlet or" pressure fluid iscontrolled by a magnetically operated valve V2 provided with a coil C2.

The magnetic valves V2, V4, V6, V8 open the conduits which theyimmediately control when the coils C2, C4, C6, C8 are energized or onand close the conduits when the coils are de-energized or off. Thisarrangement may be varied if desired but is adopted here for the sake ofuniformity and simplicity.

Referring now more particularly to the schematic, view, Figure 13, theconduits which the valves V2, V i, V6, V8 immediately control are bypassconduits 71 having their opposite ends opening into cylinders 72 onopposite sides of fluid actuated pistons 73. These pistons 73 0perateD-slide valves or equivalent devices 7 1 controlling the inlet andexhaust of fluid to conduits 75 and 76 opening out of the cylinder 72adjacent opposite ends.

The cylinders are supplied with live fluid through an inlet conduit 69and the exhaust fluid is conducted from the cylinders 72 by exhaustpipes 77. The area of the pistons 73 on the side adjacent the valve 74is less than the area of the pistons on the opposite side. One end 71aof the conduit 71 is open to the main chamber of the cylinder 72containing live fluid at all times and the other end 71?) of the conduit71 opens into the cylinder 72 at the opposite side of the pistons 73. Itis therefore evident that when the valve in the conduit 71 is opened,fluid will flow behind the piston and act upon the surface of greaterarea to move the valve 74, while when the valve controlling the conduit71 is closed fluid pressure will be exerted only on the side of thepiston hav ing the smaller area and the valve 74 will be moved in theopposite direction and be held there.

No means for exhausting fluid out of the cylinder adjacent the outer endof the piston 73 is shown but it will be understood that such exhaustmeans, together with suitable controls therefor, will be provided inpractice.

As stated above in the case of the cover 20 direct operation of itspiston by pneumatic or air pressure is suflicient for the purposes inview. The valve 74 for the cover operating piston will admit fluidthrough conduits 75, 76 directly to the opposite ends of the cylinder67.

In the case of therams, however, where high hydraulic pressure isemployed, it is more convenient to interpose further means forcontrolling the flow of hydraulic fluid through the inlet and outletconduits thereof. As shown, the pneu-- matic inlet pipes 75, 76 lead tothe opposite ends of cylinders 78 for operating pistons 79 connected tohydraulic control valves 80. The pipes 75, 76 for the horizontal ram arecross connected to opposite ends of the two cylinders employed for inletand outlet respectively while for the vertical ram the inlets 75, 76lead only to a single cylinder since, as explained above, separatecontrol valves V4 and V2 are employed for the inlet and outlet conduitsrespectively.

The pneumatic valves 74.- and related parts, together with the hydraulicvalves 80 and the magnetically operated valves, may all be locatedadjacent the cylinders to which they are related but preferably themagnetic valves or push button switches for manually controlling themare located at a central station as indicated in Fig. 1 where they maybe accessible for manual operation, whereby the units which they controlmay be operated without regard to the automatic devices. When thevalvesare so located at a central station, the bypass 71 for eachcontrol unit will be elongated sufficiently to extend between thecentral station and the cylinders 72 to which The relative positions ofthe magnetic valves and the power units which they control may besummarized as follows: When the coil C8 is energized or on the covermoves forward and when the coil C8 is deenergized the cover moves back;when the coil C6 is on the horizontal ram is back but when the coil C6is off the ram moves forward; when the coil C2 is energized or on, theoutlet for high pressure fluid from the cylinder of the vertical ram isclosed and, when the coil C2 is off, the outlet is open, and when thecoil C4 is on or energized the inlet to the vertical cylinder is closedand when the coil or is off the inlet is open.

Interposed between the various switches S1. S3, S5, S7, S9, S11, S13,and S17 which may be designated as primary switches and the coils C2,C4, C6, C8 of the magnetically operated valves for controlling themovements of the parts of the press are a plurality of relays A, B. C,D, E and F provided with coils CA, CB, CC, CD, CE and CF and withcontact members or switches SA, SB, SC, SD, SE and SF. The coils of themagnetically operated valves are .in circuit with a source of directcurrent as, for example, trunks D01 and D02. The primary switches andthe energizing coils for the relays, however, are in circuit, with asource of alternating current as, for example, trunks AC1 and AC2. Therelay switches are adapted to close contacts falling both in directcurrent circuits and in alternating current circuits.

While various types of pressure responsive de vices may be employed thepresent embodiment is that shown in detail in Figs. 11 and 12. A bracket201 supports a cylinder block 202 and the switch S13. Pressure fluidfrom cylinder 40 of the vertical ram is admitted to the cylinder chamber203 formed in block 202 by a pipe 20a so that a piston 205 operating incylinder chamher 203 is always exposed on its lower surface to thepressure of fluid as it exists in cylinder 40. The piston 205 isprovided with a stem 206 extending through a packing bushing 207 to theoutside of the cylinder block. The upper end of the stem 206 abutsagainst and actuates a bar 208 slidable upon studs 209 against theaction of a coil spring 210 arranged upon a rod 211 integral with bar208. Tension upon the spring may be adjusted by nuts 213 threaded uponstuds 209 on either side of a bar 214 slidable on the studs and the rod211 and bearing upon the upper end of the spring.

An arm 215 is adjustably mounted on the upper end of rod 211 by nuts 216and a set screw 217 for actuating a switch lever 218 of the switch S13.When pressure upon the piston 205 reaches a predetermined amount ascontrolled by adjustment of tension on spring 210 the arm 215 will becaused to actuate switch S13 to relieve pres- 15 sure upon the piston 41of the vertical ram as has already been explained. When the vertical ramcylnder and the horizontal rarn'cylinder are both connected to a commonmain as will be usual this pressure responsive device will also beinstrumental in relieving pressure on the horizontal ram as well as onthe vertical ram.

The operation of these various parts will, it is thought, be clearlyunderstood from the following outline of the cycle of operation. Atabulation of circuits involved is included therewith so that it isbelieved unnecessary to describe the wiring between the various elementsseparately. The positions of all parts at the beginning of this cycleare as illustrated in Fig. 13. From this it may be observed that thecover and rams are fully retracted; that primary switches S1, S5, S7,S9, S11,

S13, S15, S17 are open while S3 is closed; that solenoid coils V2, V4,V8 are off while V6 is on;

and that relay switches SA, SB, SC, SD, SE, SF and SFF (for the parallelpress) are all down.

The normal cycle set up by pressing the but ton of manual control switchS1 is:

I. STARTING SWITCH SI CLOSED (A) SA pulled up (circuit AC1, 104, 103,S1,

1. SA locked up (circuit AC1, 104, S3, 112,

SD, 111, SA, 110, CA, 102, AC2) 2. C8 on (circuft DCl, 106, SA, 107, C8,108, DC2)cover moves forward 3. One gap in circuit of CB closed(conductors 114, 122 at SA) 11. COVER MOVES FORWARD (A) S9 closed,bridging one gap in circuit of CD (conductors 161, 162) (13) S7closed 1. SF raised (circuit AC1, 116, S7, 115, SFF,

123, CF, 117, AC2) '(a) Two leads (120, 121) to twin press opened makingit impossible to apply hydraul'c pressure on that press while this pressis operating. (b) The normally open inlet valve 80 for the vertical ramof the twin press is closed to prevent wastage of fluid there in orderthat pressure may be built up here. This is done by energizing CO4 forVV4 of the twin press (circuit, DCl, 153, SF, 155, CO4, 63 DC2) Asimilar result is provided when the twin press is operating byenergizing V4 through circuit, DCl, 167, SFF. 168, C4, 145, DC2. 7 (0)SB pulled up (circuit AC1. 116, S7, 115, SFF, 123, SF, 114, SA, 122, CB,124, AC2) 1. C0 011 circuit DCl. 127, SB, 128, C6, 129, 108, DC2 brokenat SB)-horizontal ram moves forward.

2. C4 on (circuit DCl, 131, SB, 132, 135, SC,

inlet valve open l 'jrrntlcal 0) C2 on (circuit DC1, 14

moves so, 147, so, 148, c2, 149, u 145, DC2)-vertical outlet p valveclosed 1v. VERTICAL RAM MOVES UP (A) S15 closed 1. One gap in lookcircu't of CE bridged (conductors 157,158) 2. SF locked up (circuit,AC1, 158, S15, 119,

SF, 118, CF, 117, AC2) (13) S17 closed 1. Second gap of CD bridged(conductors V. PRESSURE REACHES 1600 POUNDS ON GAUGE, completing thecompressing cycle. (A) S13 closed 1. Last gap closed in make circuit ofCD to raise SD (Circuit AC1, 161, S9, 162, S13, 159, S17, 160, CD, 163,AC2) (a) SD locked up beyond control of S13, S17 (circut AC1, 161, SS,162, 166, SD, 165, CD, 163, AC2) (12) C2 oiT-vertical outlet valveopened (circuit broken by raising of SD) Vertical (0) C4 on--verticalinlet valve ram closed (circuit B01, 131, moves 133, SD, 134, 132, 136,SD, down 137, 143, 144, C4, 145, D02) 1'. Pressure drops, S13 opened(conductors ((1) SA dropped (circuit broken at 112, 111

by rais'ng of SD) 1. Gap in lock circuit CA opened (conductors 110, 111)2. C8 oiT--cover moved back (circuit broken at 106, 107 by dropping ofSA) 3. SB dropped (circuit broken at 114, 122

by dropping of SA) (a) C6 oninlet valve closed and outlet valve 0 p e ne d horizontal ram moved back under constant pressure in pull-backcylinders (crcuit B01, 127, SB, 128, C6, 129, 108, D02) VI. COVER MOVESBACK (A) S7 opened making another gap in circuit of CB (conductors 115,116) (B) S9 opened 1. SD dropped (circuit broken at 161 162 by openingof S9) (a) Gap in lock circuit CD opened (conductors 165, 166) (b) C2on-vertical outlet valve closed (crcuit DCl, 146, SC, 147, SD, 148, C2,149, 145, D02) ram (0) C4 oiT-vertical inlet valve moves opened (circuitbroken at up 133, 134 and also at 136, 137 by dropping of SD) Verticalneat-nee VII. HORIZONTAL RAM MOVES BACK (A S11 opened making gap in makecircuit of CC (conductors 138, 139) V111. VERTICAL RAM MOVES FULLY UP tolift bale out of box.

(A) S5 closed 1. SE raised (crcuit AC1, 170, S5, 171, CE,

a) SE locked up (circuit AC1, 158, S15,

157, SE, 175, CE. 172, AC2) (b) C 1 onvertical inlet valve closed(circuit DCl, 176, SE. 177. 144. ca, 145.

(1 SC dropped (circuit at 154, 152 broken by raising of SE) 1. Gap inlock circuit CC opened (conductors 151, 152) 2'. C2 oil-vertical outletvalve opened (circuit broken at 1 17 148 by dropping of SD) 1X. VERTICALRAM MOVES DOWN (A) S5 opened making one gap in make circuit of CE!(conductors 170, 171) (B) S15 opened 1. SE dropped (circuit broken at158, 157 by opening of S15) (a) Another gap in look circuit of CE opened(conductors 157, 175) (1)) C4 off-vertical inlet valve opened (circuitbroken at 176, 177 by dropping of SE) (c) Gap in look circuit of CCclosed (conductors 152, 154) 2. SF dropped (circuit broken at 119, 158by opening of $15) (a) Gap in look circuit of CF opened (conductors 118,119) (1)) Circuit to twin press closed making it possible to operatethat press (conductors 120, 121) (0) Another gap in circuit of CB opened(conductors 11 1, 123) (C) S17 broken, opening another gap in makecircuit of CD (S13 and S9 already open in its circuit) (conductors 159,160) Should anything happen to make it necessary or desirable tointerrupt the normal operation of the press after the cycle has beeninitiated, this may be done by pressing the button to open switch S3which is located near S1. Opening of switch S3 breaks the lock circuitof the coil CA of relay A to drop SA. The circuit involved is AC1, 104,S3, 112, SD, 111, SA, 110. CA, 102, AC2. Relay A may be considered asthe master control element of the apparatus and its deenergizationcauses the return of all parts to their original or normal off positionsat any stage of the compressing cycle. A detailed recital of themovements following the deenergization of relay A would be ratherinvolved if every possible situation, i. e., the interruption of normaloperation at any and every stage of movement throughout the cycle, werediscussed and this recital it is believed may be excused since aconsideration of the circuit diagram and the above outline of the normalcycle should furnish an understanding of movements occurring afterinterruption.

As hereinbefore stated the solenoid operated valves controlling theby-pass conduits 71 are preferably located where they may be operatedmanually. For this purpose the stems of the valves are made to extendbeyond their actuating coils so as to be readily accessible. Since thecontrol of fluid in conduits 71 is sufficient to cause movement of thepower units without regard the automatic control devices it is obviousthat the power units may be actuated individually out of turn either atany time during the cycle or any other time. a

I desire it to be understood that the present invention is susceptibleof various embodiments other than that disclosed above and that it isnot to be limited except as specified in the claims.

What I claim is:

1. In a baling press or the like, in combination, means providing amaterial receiving chamber, fluid pressure operated cover movable toclose one side of the chamber, fluid pressure operated ram movable intosaid chamber, a second fluid pres-= m sure operated ram movable intosaid chamber across the face of said first mentioned ram, meanscontrolled by the movement of said cover and said first mentioned ram tocause said second men" tioned ram to be actuated only after the coverand first ram have moved forward, means including a pressure responsivedevice for relieving pres sure upon said rams at a predeterrriined pointand permitting withdrawal of said rams and said cover, means controlledby movement of the cover for thereafter effecting re-applicati0n ofpressure upon said second ram to cause it to eject the bale from thechamber, and means controlled by movement of said second ram upon itsbale ejecting stroke for causing all unreturned ele ments to return totheir original positions or" rest,

2. In a baling press or the like, in combination, means providing amaterial receiving chamber, a fluid pressure operated cover movable toclose one side of the chamber, a fluid pressure operated ram movableinto said chamber, a second fluid pressure operated ram movable intosaid chamber across the face of said first mentioned ram, meanscontrolled by the movement of said cover and said first mentioned rainto cause said second men tionecl ram to be actuated only after the coverand first ram have moved forward, means includ ing a pressure responsivedevice for relieving pres sure upon said rams at a predetermined pointand permitting withdrawal of said rams and said cover, and meansincluding a switch operated by said cover and parts controlled by saidswitch -ior thereafter effecting re-application oi pressure upon saidsecond ram to cause it to eject the bale from the chamber.

3. In a baling press or the like, in combination, means providing amaterial receiving chamber, a power operated cover movable over one sideof said chamber, a plurality of power operated. rains movable into saidchamber, a pressure responsive 1 device for limiting the pressure ofsaid rams upon a bale of material in said chamber, manually con trolledmeans for initiating a cycle of operation of said power operatedelements, interlocking means associated with and controlled by themovement 0 of said elements which causes coordinated move ment of all ofthem to compress and eject a bale and to return to their initialpositions, manually controlled supervisory means for interrupting cycleat any time during the compression cycle, and means controlled by theaction of said supervisory means for returning the parts to initialpositions upon such interruption.

4. In a baling press or the like, in combine tion, means providing amaterial receiving chamber, a power operated cover movable over one sideof said chamber, a power operated ram movable into said chamber from onedirection, a second power operated ram movable into said chamber in adirection transverse to the first,

l. lliil and interlocking means associated with and controlled inaccordance with the movements of said power operated elements whichcauses coordinated movement of all of them to compress and eject a baleand to return them to their original positions by the initial operationof a single control element at the beginning of a cycle, said meansincluding electromagnetic relays, switches operated by said cover andrams governing the relays, and electromagnetically operated powerregulating devices governed by said relays controlling the movements ofsaid cover and rams in coordination to the completion of the cycle.

5. In a baling press or the like, in combination, means providing amaterial receiving chamber, a fluid pressure operated cover movable toclose one side of the chamber, a fluid pressure operated ram movableinto said chamber, a second fluid pressure operated ram movable intochamber across the face of said first mentioned ram, means controlled bythe movement oi said cover and said first mentioned ram which causessaid second mentioned ram to be actuated only after the cover and firstram have moved forward, means including a pressure responsive device forrelieving pressure upon said rams and-cover at a predetermined point,and means controlled by the pressure responsive de vice for causingwithdrawal of said rams and said cover.

6. In a baling press or the like, in combination, means providing amaterial receiving chamber, a power operated cover movable to close oneside of the chamber, a pressure fluid operated ram movable into thechamber, a pressure responsive device associated with said ram forrelieving pressure thereupon at a predetermined point while a bale iscompressed, means ache by in. e rcsporn ive device ceus ing the returnof the cover and ram, and means controlled by said cover to preventre-application of pressure upon the ram until the cover is withdrawn,said last-named means causing reapplication of pressure upon the ram toeject the bale from the press;

'7. In a baling press or the like, in combination, means providing amaterialreceiving chamber, a power operated cover movable to close oneside of the chamber, a power operated ram movable into the chamber whilethe cover is closed to compress a bale of material and subsequentlybeing further movable when said cover is removed to eject the bale,means responsive to the closing movement of said cover for advancingsaid ram, means responsive to the pressure on the ram for retracting theram, and means responsive to the opening movement of said cover foragain advancing the ram to eject the bale.

8. In a baling press or the like, in combination, means providing amaterial receiving chamber, a plurality of power operated rams for saidchamber, one of said rams being movable transversely of another of saidrams, and interlocking means associated with said rams and responsive tothe movements thereof which mutually control without the necessity ofmanual intercession after the cycle of operations has been initiated themovement of one by movement of another and vice versa until the cycle ofoperations has been completed, said rams each being operated by a fluidpressure device, and said controlling means comprising anelectromagnetic valve for controlling the flow of fluid to each of saiddevices and an electrical circuit including a switch operated bymovement of one of said rams for controlling the valve and through itthe operation of another of said rams.

DAVID L. STEVE KEY.

